NUDT15 codon 139 is the best pharmacogenetic marker for predicting thiopurine-induced severe adverse events in Japanese patients with inflammatory bowel disease: a multicenter study.
NUDT15p.R139C was strongly associated with early leukopenia and severe alopecia (OR for early leukopenia: 107.624, 95% CI 18.857-614.250, p=1.403 × 10<sup>-7</sup>, OR for severe alopecia: 77.152, 95% CI 17.378-342.526, p=1.101 × 10<sup>-8</sup>).
NUDT15rs116855232" genes_norm="55270">R139C (rs116855232) is a recently identified genetic factor responsible for thiopurine-induced leukocytopenia and hair loss.